The notices concern a software update, which will “automatically shift the cars into park if the driver’s door opens while the engine is running,” the Associated Press reported. The car company began sending out the software updates to car dealers last week, which was prior to Yelchin’s death. However, car owners only receive final notices “when the service [the software update] becomes available,” the company said.

The rollout of the software update represents an acceleration in the recall timeline; the company said earlier that the update would be available “no later than July or August”, Reuters reported. (The company says that the acceleration began in May.)

The software update affects most of the recalled cars, though an update for the remaining vehicles is “imminent”. The recalled vehicles include 2012 through 2014 Dodge Chargers and Chrysler 300s, as well as 2014 and 2015 Jeep Grand Cherokees.

Fiat Chrysler has stressed that it’s unclear at this point what caused the crash involved in Yelchin’s death, though the US National Highway Traffic Safety Administration said that it was “the first fatality we’re aware of that may be related to this safety defect and vehicle recall”. Police in Los Angeles are still investigating, and Fiat Chrysler confirmed that it, too, was looking into the crash. [Associated Press]